.container
    max-width 600px
    margin 0 auto
    padding 20px
    font-family Arial, sans-serif
    h1
        text-align center
    p
        line-height 1.6  // 行高 字体大小的1.6倍
    .more
        background-color #007bff
        color white
        text-decoration none
        position relative
        transition all .3s ease
        &::before
            content ''
            position absolute
            bottom 0
            left 0
            width 100%
            height 2px
            background-color red
            transform scaleX(0)
            transform-origin bottom right 
            transition transform .3s ease
        &:hover::before
            transform scaleX(1)
            transform-origin bottom left